Material is qt500

Post treatment process to remove alkali explosion

Alkali blasting is to remove the residual sand deep holes, small round holes complicated inner walls of castings.

Operation process

Make a fire to make a stove. When the wood is very strong, add coal coke.

When the coke of EPC casting is ignited nationwide, it is put into alkali explosion clamp pot flake alkali is added.

When the temperature of caustic soda solution is above 500C, turn off the blower motor let it ignite.

When the temperature of caustic soda solution is above 700 ° C, put it into the heated casting basket.

The casting is insulated above the caustic soda solution 700C for 20min (depending on the size of the casting the amount of residual sand), removed, drained of the caustic soda solution,

It was quickly put into the reservoir exploded.

Put the heated casting basket patrol ring into the caustic soda solution.

Put the alkali blasted casting into the sulfuric acid tank, carry out the intermediate solution, then clean the tap water.

Remove the residual sand in the caustic solution immediately to ensure the quality of the caustic solution.

common problem

The actual operation staff must wear safety clothes, masks, myopia glasses breathing masks. When the actual operation of alkali explosion, the skin does need to be exposed.

All practical operation supplies special tools must be heated. It is forbidden for cold damp special tools to enter into the caustic soda solution, resulting in explosion accident splashing of caustic soda solution. .

When there is water leakage in the tongs, it is necessary to panic take effective measures immediately.

Ensure production safety without accidents.